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Protection and storage of chlorophyll in overwintering evergreens
Open accessAbstract
How evergreen species store and protect chlorophyll during exposure to high light in winter remains unexplained. This study reveals that the evergreen snow gum ( Eucalyptus pauciflora Sieb. ex Spreng.) stores and protects its chlorophylls by forming special complexes that are unique to the winter-acclimated state. Our in vivo spectral and kinetic characterizations reveal a prominent component of the chlorophyll fluorescence spectrum around 715 nm at 77 K. This band coincides structurally with a loss of chlorophyll and an increase in energy-dissipating carotenoids. Functionally, the band coincides with an increased capacity to dissipate excess light energy, absorbed by the chlorophylls, as heat without intrathylakoid acidification. The increased heat dissipation helps protect the chlorophylls from photo-oxidative bleaching and thereby facilitates rapid recovery of photosynthesis in spring.
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Cited by
Non-Photochemical Quenching. A Response to Excess Light Energy
Müller, P., Li, X.-P., & Niyogi, K. K. (2001) · Plant Physiology · doi:10.1104/pp.125.4.1558 · Cited by 2,840
Photoprotection in an ecological context: the remarkable complexity of thermal energy dissipation
Demmig‐Adams, B., & Adams, W. W. (2006) · New Phytologist · doi:10.1111/j.1469-8137.2006.01835.x · Cited by 892
Photostasis and cold acclimation: sensing low temperature through photosynthesis
Ensminger, I., Busch, F., & Huner, N. P. A. (2006) · Physiologia Plantarum · doi:10.1111/j.1399-3054.2006.00627.x · Cited by 578
Molecular design of the photosystem II light-harvesting antenna: photosynthesis and photoprotection
Horton, P. (2004) · Journal of Experimental Botany · doi:10.1093/jxb/eri023 · Cited by 458
Horton, P., Wentworth, M., & Ruban, A. (2005) · FEBS Letters · doi:10.1016/j.febslet.2005.07.003 · Cited by 320
Metadata
- Authors
- Gilmore, A. M., & Ball, M. C.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2000-09-05
- Volume
- 97
- Issue
- 20
- Pages
- 11098-11101
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1964380262
- Cited by
- 165
- References
- 0
- FWCI
- 3.83
- Type
- journal article
- Language
- en
- Open access
- green
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